Mod DB now offers a new version 1.3 of the Hell Unleashed modification for Diablo II. The new update is called a "community patch," and this website outlines all that it does. Here's the general overview of the mod: "This mod is focused towards group multiplayer in a manner of which a group of friends or players can start fresh new characters and fight through the forces of hell side by side, although there is a solo edition available." Thanks Ant.